growth on my hen

I have a Valley hen that has a growth the size of a ping pong ball on one side of her breast. She doesn't act funny, eats, seems fine other wise. I felt it and it is solid, doesn't move around like an absess would. Any clues?

I'm no expert, but that sounds like either a cyst or a tumor. As long as she's acting normal it's probably not a major concern, though it might be prudent to take her to an avian vet if you're at all attached to her, especially if she's young or you're using her for breeding. Some types of cancer in birds have genetic links and propensity for some types of tumors can be inherited, so it's best not to use a bird with a heritable form of cancer for a breeding program.
A vet would be able to give you a definite diagnosis as well as options for treatment.